diff options
Diffstat (limited to 'server/mpm/mpmt_os2')
| -rw-r--r-- | server/mpm/mpmt_os2/Makefile.in | 5 | ||||
| -rw-r--r-- | server/mpm/mpmt_os2/config5.m4 | 5 | ||||
| -rw-r--r-- | server/mpm/mpmt_os2/mpm.h | 74 | ||||
| -rw-r--r-- | server/mpm/mpmt_os2/mpm_default.h | 116 | ||||
| -rw-r--r-- | server/mpm/mpmt_os2/mpmt_os2.c | 587 | ||||
| -rw-r--r-- | server/mpm/mpmt_os2/mpmt_os2_child.c | 463 |
6 files changed, 1250 insertions, 0 deletions
diff --git a/server/mpm/mpmt_os2/Makefile.in b/server/mpm/mpmt_os2/Makefile.in new file mode 100644 index 0000000000..38e598edf3 --- /dev/null +++ b/server/mpm/mpmt_os2/Makefile.in @@ -0,0 +1,5 @@ + +LTLIBRARY_NAME = libmpmt_os2.la +LTLIBRARY_SOURCES = mpmt_os2.c mpmt_os2_child.c + +include $(top_srcdir)/build/ltlib.mk diff --git a/server/mpm/mpmt_os2/config5.m4 b/server/mpm/mpmt_os2/config5.m4 new file mode 100644 index 0000000000..b27c296d2a --- /dev/null +++ b/server/mpm/mpmt_os2/config5.m4 @@ -0,0 +1,5 @@ +if test "$MPM_NAME" = "mpmt_os2" ; then + AC_CACHE_SAVE + APACHE_FAST_OUTPUT(server/mpm/$MPM_NAME/Makefile) + APR_ADDTO(CFLAGS,-Zmt) +fi diff --git a/server/mpm/mpmt_os2/mpm.h b/server/mpm/mpmt_os2/mpm.h new file mode 100644 index 0000000000..37d2f6c20c --- /dev/null +++ b/server/mpm/mpmt_os2/mpm.h @@ -0,0 +1,74 @@ +/* ==================================================================== + * The Apache Software License, Version 1.1 + * + * Copyright (c) 2000-2001 The Apache Software Foundation. All rights + * reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. The end-user documentation included with the redistribution, + * if any, must include the following acknowledgment: + * "This product includes software developed by the + * Apache Software Foundation (http://www.apache.org/)." + * Alternately, this acknowledgment may appear in the software itself, + * if and wherever such third-party acknowledgments normally appear. + * + * 4. The names "Apache" and "Apache Software Foundation" must + * not be used to endorse or promote products derived from this + * software without prior written permission. For written + * permission, please contact apache@apache.org. + * + * 5. Products derived from this software may not be called "Apache", + * nor may "Apache" appear in their name, without prior written + * permission of the Apache Software Foundation. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR + * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * ==================================================================== + * + * This software consists of voluntary contributions made by many + * individuals on behalf of the Apache Software Foundation. For more + * information on the Apache Software Foundation, please see + * <http://www.apache.org/>. + * + * Portions of this software are based upon public domain software + * originally written at the National Center for Supercomputing Applications, + * University of Illinois, Urbana-Champaign. + */ + +#ifndef APACHE_MPM_MPMT_OS2_H +#define APACHE_MPM_MPMT_OS2_H + +#define MPMT_OS2_MPM + +#include "httpd.h" +#include "mpm_default.h" +#include "scoreboard.h" + +#define MPM_NAME "MPMT_OS2" + +extern server_rec *ap_server_conf; +#define AP_MPM_WANT_SET_PIDFILE +#define AP_MPM_WANT_SET_MAX_REQUESTS + +#endif /* APACHE_MPM_SPMT_OS2_H */ diff --git a/server/mpm/mpmt_os2/mpm_default.h b/server/mpm/mpmt_os2/mpm_default.h new file mode 100644 index 0000000000..100beb2e61 --- /dev/null +++ b/server/mpm/mpmt_os2/mpm_default.h @@ -0,0 +1,116 @@ +/* ==================================================================== + * The Apache Software License, Version 1.1 + * + * Copyright (c) 2000-2001 The Apache Software Foundation. All rights + * reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. The end-user documentation included with the redistribution, + * if any, must include the following acknowledgment: + * "This product includes software developed by the + * Apache Software Foundation (http://www.apache.org/)." + * Alternately, this acknowledgment may appear in the software itself, + * if and wherever such third-party acknowledgments normally appear. + * + * 4. The names "Apache" and "Apache Software Foundation" must + * not be used to endorse or promote products derived from this + * software without prior written permission. For written + * permission, please contact apache@apache.org. + * + * 5. Products derived from this software may not be called "Apache", + * nor may "Apache" appear in their name, without prior written + * permission of the Apache Software Foundation. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR + * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * ==================================================================== + * + * This software consists of voluntary contributions made by many + * individuals on behalf of the Apache Software Foundation. For more + * information on the Apache Software Foundation, please see + * <http://www.apache.org/>. + * + * Portions of this software are based upon public domain software + * originally written at the National Center for Supercomputing Applications, + * University of Illinois, Urbana-Champaign. + */ + +#ifndef APACHE_MPM_DEFAULT_H +#define APACHE_MPM_DEFAULT_H + +/* Number of servers processes to spawn off by default + */ +#ifndef DEFAULT_START_DAEMON +#define DEFAULT_START_DAEMON 2 +#endif + +/* We don't need many processes, + * they're only for redundancy in the event of a crash + */ +#define HARD_SERVER_LIMIT 10 + +/* Limit on the total number of threads per process + */ +#ifndef HARD_THREAD_LIMIT +#define HARD_THREAD_LIMIT 256 +#endif + +/* Maximum number of *free* server threads --- more than this, and + * they will die off. + */ + +#ifndef DEFAULT_MAX_SPARE_THREAD +#define DEFAULT_MAX_SPARE_THREAD 10 +#endif + +/* Minimum --- fewer than this, and more will be created */ + +#ifndef DEFAULT_MIN_SPARE_THREAD +#define DEFAULT_MIN_SPARE_THREAD 5 +#endif + +/* Where the main/parent process's pid is logged */ +#ifndef DEFAULT_PIDLOG +#define DEFAULT_PIDLOG "logs/httpd.pid" +#endif + +/* + * Interval, in microseconds, between scoreboard maintenance. + */ +#ifndef SCOREBOARD_MAINTENANCE_INTERVAL +#define SCOREBOARD_MAINTENANCE_INTERVAL 1000000 +#endif + +/* Number of requests to try to handle in a single process. If <= 0, + * the children don't die off. + */ +#ifndef DEFAULT_MAX_REQUESTS_PER_CHILD +#define DEFAULT_MAX_REQUESTS_PER_CHILD 10000 +#endif + +/* AP_CHILD_THREAD_FROM_ID is used by the scoreboard. */ +#define AP_CHILD_THREAD_FROM_ID(i) (i / HARD_THREAD_LIMIT), (i % HARD_THREAD_LIMIT) +#define AP_ID_FROM_CHILD_THREAD(c, t) ((c * HARD_THREAD_LIMIT) + t) + +#endif /* AP_MPM_DEFAULT_H */ diff --git a/server/mpm/mpmt_os2/mpmt_os2.c b/server/mpm/mpmt_os2/mpmt_os2.c new file mode 100644 index 0000000000..99806d1c8e --- /dev/null +++ b/server/mpm/mpmt_os2/mpmt_os2.c @@ -0,0 +1,587 @@ +/* ==================================================================== + * The Apache Software License, Version 1.1 + * + * Copyright (c) 2000-2001 The Apache Software Foundation. All rights + * reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. The end-user documentation included with the redistribution, + * if any, must include the following acknowledgment: + * "This product includes software developed by the + * Apache Software Foundation (http://www.apache.org/)." + * Alternately, this acknowledgment may appear in the software itself, + * if and wherever such third-party acknowledgments normally appear. + * + * 4. The names "Apache" and "Apache Software Foundation" must + * not be used to endorse or promote products derived from this + * software without prior written permission. For written + * permission, please contact apache@apache.org. + * + * 5. Products derived from this software may not be called "Apache", + * nor may "Apache" appear in their name, without prior written + * permission of the Apache Software Foundation. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR + * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * ==================================================================== + * + * This software consists of voluntary contributions made by many + * individuals on behalf of the Apache Software Foundation. For more + * information on the Apache Software Foundation, please see + * <http://www.apache.org/>. + * + * Portions of this software are based upon public domain software + * originally written at the National Center for Supercomputing Applications, + * University of Illinois, Urbana-Champaign. + */ + +/* Multi-process, multi-threaded MPM for OS/2 + * + * Server consists of + * - a main, parent process + * - a small, static number of child processes + * + * The parent process's job is to manage the child processes. This involves + * spawning children as required to ensure there are always ap_daemons_to_start + * processes accepting connections. + * + * Each child process consists of a a pool of worker threads and a + * main thread that accepts connections & passes them to the workers via + * a work queue. The worker thread pool is dynamic, managed by a maintanence + * thread so that the number of idle threads is kept between + * min_spare_threads & max_spare_threads. + * + */ + +/* + Todo list + - Fix log file clashing between child processes + - Enforce MaxClients somehow + - Catch thread exceptions & initiate graceful shutdown of child process +*/ +#define CORE_PRIVATE +#define INCL_NOPMAPI +#define INCL_DOS +#define INCL_DOSERRORS + +#include "ap_config.h" +#include "httpd.h" +#include "mpm_default.h" +#include "http_main.h" +#include "http_log.h" +#include "http_config.h" +#include "http_core.h" /* for get_remote_host */ +#include "http_connection.h" +#include "mpm.h" +#include "ap_mpm.h" +#include "ap_listen.h" +#include "apr_portable.h" +#include "mpm_common.h" +#include "apr_strings.h" +#include <os2.h> +#include <process.h> + +server_rec *ap_server_conf; +static apr_pool_t *pconf = NULL; /* Pool for config stuff */ +static const char *ap_pid_fname=NULL; + +/* Config globals */ +static int one_process = 0; +static int ap_daemons_to_start = 0; +static int ap_thread_limit = 0; +static int ap_max_requests_per_child = 0; +int ap_min_spare_threads = 0; +int ap_max_spare_threads = 0; + +/* Keep track of a few interesting statistics */ +int ap_max_daemons_limit = -1; + +/* volatile just in case */ +static int volatile shutdown_pending; +static int volatile restart_pending; +static int volatile is_graceful = 0; +ap_generation_t volatile ap_my_generation=0; /* Used by the scoreboard */ +static int is_parent_process=TRUE; +HMTX ap_mpm_accept_mutex = 0; + +/* An array of these is stored in a shared memory area for passing + * sockets from the parent to child processes + */ +typedef struct { + struct sockaddr_in name; + apr_os_sock_t listen_fd; +} listen_socket_t; + +typedef struct { + apr_os_file_t errorlog_fd; + apr_time_t restart_time; + HMTX accept_mutex; + listen_socket_t listeners[1]; +} parent_info_t; + +static char master_main(); +static void spawn_child(int slot); +void ap_mpm_child_main(apr_pool_t *pconf); +static void set_signals(); + + +int ap_mpm_run(apr_pool_t *_pconf, apr_pool_t *plog, server_rec *s ) +{ + char *listener_shm_name; + parent_info_t *parent_info; + ULONG rc; + pconf = _pconf; + ap_server_conf = s; + restart_pending = 0; + + DosSetMaxFH(ap_thread_limit * 2); + listener_shm_name = apr_psprintf(pconf, "/sharemem/httpd/parent_info.%d", getppid()); + rc = DosGetNamedSharedMem((PPVOID)&parent_info, listener_shm_name, PAG_READ); + is_parent_process = rc != 0; + ap_scoreboard_fname = apr_psprintf(pconf, "/sharemem/httpd/scoreboard.%d", is_parent_process ? getpid() : getppid()); + + if (rc == 0) { + /* Child process */ + ap_listen_rec *lr; + int num_listeners = 0; + + apr_file_close(ap_server_conf->error_log); + apr_os_file_put(&ap_server_conf->error_log, &parent_info->errorlog_fd, pconf); + ap_restart_time = parent_info->restart_time; + ap_mpm_accept_mutex = parent_info->accept_mutex; + + /* Set up a default listener if necessary */ + if (ap_listeners == NULL) { + ap_listen_rec *lr = apr_pcalloc(s->process->pool, sizeof(ap_listen_rec)); + ap_listeners = lr; + apr_sockaddr_info_get(&lr->bind_addr, "0.0.0.0", APR_UNSPEC, + DEFAULT_HTTP_PORT, 0, s->process->pool); + apr_socket_create(&lr->sd, lr->bind_addr->sa.sin.sin_family, + SOCK_STREAM, s->process->pool); + } + + for (lr = ap_listeners; lr; lr = lr->next) { + apr_os_sock_put(&lr->sd, &parent_info->listeners[num_listeners].listen_fd, pconf); + num_listeners++; + } + + DosFreeMem(parent_info); + + /* Do the work */ + ap_mpm_child_main(pconf); + + /* Outta here */ + return 1; + } + else { + /* Parent process */ + char restart; + is_parent_process = TRUE; + ap_log_pid(pconf, ap_pid_fname); + + if (ap_setup_listeners(ap_server_conf) < 1) { + ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_ALERT, 0, s, + "no listening sockets available, shutting down"); + return 1; + } + + restart = master_main(); + ++ap_my_generation; + ap_scoreboard_image->global.running_generation = ap_my_generation; + + if (!restart) { + const char *pidfile = ap_server_root_relative(pconf, ap_pid_fname); + + if (pidfile != NULL && remove(pidfile) == 0) { + ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_INFO, APR_SUCCESS, + ap_server_conf, "removed PID file %s (pid=%d)", + pidfile, getpid()); + } + + ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, 0, ap_server_conf, + "caught SIGTERM, shutting down"); + return 1; + } + } /* Parent process */ + + return 0; /* Restart */ +} + + + +/* Main processing of the parent process + * returns TRUE if restarting + */ +static char master_main() +{ + server_rec *s = ap_server_conf; + ap_listen_rec *lr; + parent_info_t *parent_info; + char *listener_shm_name; + int listener_num, num_listeners, slot; + ULONG rc; + + printf("%s \n", ap_get_server_version()); + set_signals(); + + if (ap_setup_listeners(ap_server_conf) < 1) { + ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_ALERT, 0, s, + "no listening sockets available, shutting down"); + return FALSE; + } + + /* Allocate a shared memory block for the array of listeners */ + for (num_listeners = 0, lr = ap_listeners; lr; lr = lr->next) { + num_listeners++; + } + + listener_shm_name = apr_psprintf(pconf, "/sharemem/httpd/parent_info.%d", getpid()); + rc = DosAllocSharedMem((PPVOID)&parent_info, listener_shm_name, + sizeof(parent_info_t) + num_listeners * sizeof(listen_socket_t), + PAG_READ|PAG_WRITE|PAG_COMMIT); + + if (rc) { + ap_log_error(APLOG_MARK, APLOG_ALERT, APR_FROM_OS_ERROR(rc), s, + "failure allocating shared memory, shutting down"); + return FALSE; + } + + /* Store the listener sockets in the shared memory area for our children to see */ + for (listener_num = 0, lr = ap_listeners; lr; lr = lr->next, listener_num++) { + apr_os_sock_get(&parent_info->listeners[listener_num].listen_fd, lr->sd); + } + + /* Create mutex to prevent multiple child processes from detecting + * a connection with apr_poll() + */ + + rc = DosCreateMutexSem(NULL, &ap_mpm_accept_mutex, DC_SEM_SHARED, FALSE); + + if (rc) { + ap_log_error(APLOG_MARK, APLOG_ALERT, APR_FROM_OS_ERROR(rc), s, + "failure creating accept mutex, shutting down"); + return FALSE; + } + + ap_restart_time = apr_time_now(); + parent_info->restart_time = ap_restart_time; + parent_info->accept_mutex = ap_mpm_accept_mutex; + apr_os_file_get(&parent_info->errorlog_fd, s->error_log); + + /* Allocate shared memory for scoreboard */ + if (ap_scoreboard_image == NULL) { + rc = DosAllocSharedMem((PPVOID)&ap_scoreboard_image, ap_scoreboard_fname, + sizeof(scoreboard), PAG_COMMIT|PAG_READ|PAG_WRITE); + + if (rc) { + ap_log_error(APLOG_MARK, APLOG_ERR, APR_FROM_OS_ERROR(rc), ap_server_conf, + "unable to allocate shared memory for scoreboard , exiting"); + return FALSE; + } + + memset(ap_scoreboard_image, 0, sizeof(scoreboard)); + } + + ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_NOTICE, 0, ap_server_conf, + "%s configured -- resuming normal operations", + ap_get_server_version()); + ap_log_error(APLOG_MARK, APLOG_NOERRNO|APLOG_INFO, 0, ap_server_conf, + "Server built: %s", ap_get_server_built()); + + if (one_process) { + ap_scoreboard_image->parent[0].pid = getpid(); + ap_mpm_child_main(pconf); + return FALSE; + } + + while (!restart_pending && !shutdown_pending) { + RESULTCODES proc_rc; + PID child_pid; + int active_children = 0; + + /* Count number of active children */ + for (slot=0; slot < HARD_SERVER_LIMIT; slot++) { + active_children += ap_scoreboard_image->parent[slot].pid != 0 && + !ap_scoreboard_image->parent[slot].quiescing; + } + + /* Spawn children if needed */ + for (slot=0; slot < HARD_SERVER_LIMIT && active_children < ap_daemons_to_start; slot++) { + if (ap_scoreboard_image->parent[slot].pid == 0) { + spawn_child(slot); + active_children++; + } + } + + rc = DosWaitChild(DCWA_PROCESSTREE, DCWW_NOWAIT, &proc_rc, &child_pid, 0); + + if (rc == 0) { + /* A child has terminated, remove its scoreboard entry & terminate if necessary */ + for (slot=0; ap_scoreboard_image->parent[slot].pid != child_pid && slot < HARD_SERVER_LIMIT; slot++); + + if (slot < HARD_SERVER_LIMIT) { + ap_scoreboard_image->parent[slot].pid = 0; + ap_scoreboard_image->parent[slot].quiescing = 0; + + if (proc_rc.codeTerminate == TC_EXIT) { + /* Child terminated normally, check its exit code and + * terminate server if child indicates a fatal error + */ + if (proc_rc.codeResult == APEXIT_CHILDFATAL) + break; + } + } + } else if (rc == ERROR_CHILD_NOT_COMPLETE) { + /* No child exited, lets sleep for a while.... */ + apr_sleep(SCOREBOARD_MAINTENANCE_INTERVAL); + } + } + + /* Signal children to shut down, either gracefully or immediately */ + for (slot=0; slot<HARD_SERVER_LIMIT; slot++) { + kill(ap_scoreboard_image->parent[slot].pid, is_graceful ? SIGHUP : SIGTERM); + } + + DosFreeMem(parent_info); + return restart_pending; +} + + + +static void spawn_child(int slot) +{ + PPIB ppib; + PTIB ptib; + char fail_module[100]; + char progname[CCHMAXPATH]; + RESULTCODES proc_rc; + ULONG rc; + + ap_scoreboard_image->parent[slot].generation = ap_my_generation; + DosGetInfoBlocks(&ptib, &ppib); + DosQueryModuleName(ppib->pib_hmte, sizeof(progname), progname); + rc = DosExecPgm(fail_module, sizeof(fail_module), EXEC_ASYNCRESULT, + ppib->pib_pchcmd, NULL, &proc_rc, progname); + + if (rc) { + ap_log_error(APLOG_MARK, APLOG_ERR, APR_FROM_OS_ERROR(rc), ap_server_conf, + "error spawning child, slot %d", slot); + } + + if (ap_max_daemons_limit < slot) { + ap_max_daemons_limit = slot; + } + + ap_scoreboard_image->parent[slot].pid = proc_rc.codeTerminate; +} + + + +/* Signal handling routines */ + +static void sig_term(int sig) +{ + shutdown_pending = 1; +} + + + +static void sig_restart(int sig) +{ + if (sig == SIGUSR1) { + is_graceful = 1; + } + + restart_pending = 1; +} + + + +static void set_signals() +{ + struct sigaction sa; + + sigemptyset(&sa.sa_mask); + sa.sa_flags = 0; + sa.sa_handler = sig_term; + + if (sigaction(SIGTERM, &sa, NULL) < 0) + ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGTERM)"); + + if (sigaction(SIGINT, &sa, NULL) < 0) + ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGINT)"); + + sa.sa_handler = sig_restart; + + if (sigaction(SIGHUP, &sa, NULL) < 0) + ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGHUP)"); + if (sigaction(SIGUSR1, &sa, NULL) < 0) + ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGUSR1)"); +} + + + +/* Enquiry functions used get MPM status info */ + +AP_DECLARE(apr_status_t) ap_mpm_query(int query_code, int *result) +{ + switch (query_code) { + case AP_MPMQ_MAX_DAEMON_USED: + *result = ap_max_daemons_limit; + return APR_SUCCESS; + case AP_MPMQ_IS_THREADED: + *result = AP_MPMQ_DYNAMIC; + return APR_SUCCESS; + case AP_MPMQ_IS_FORKED: + *result = AP_MPMQ_NOT_SUPPORTED; + return APR_SUCCESS; + case AP_MPMQ_HARD_LIMIT_DAEMONS: + *result = HARD_SERVER_LIMIT; + return APR_SUCCESS; + case AP_MPMQ_HARD_LIMIT_THREADS: + *result = HARD_THREAD_LIMIT; + return APR_SUCCESS; + case AP_MPMQ_MIN_SPARE_DEAMONS: + *result = 0; + return APR_SUCCESS; + case AP_MPMQ_MAX_SPARE_DAEMONS: + *result = 0; + return APR_SUCCESS; + case AP_MPMQ_MAX_REQUESTS_DEAMON: + *result = ap_max_requests_per_child; + return APR_SUCCESS; + } + return APR_ENOTIMPL; +} + + + +int ap_graceful_stop_signalled(void) +{ + return is_graceful; +} + + + +/* Configuration handling stuff */ + +static void mpmt_os2_pre_config(apr_pool_t *pconf, apr_pool_t *plog, apr_pool_t *ptemp) +{ + one_process = !!ap_exists_config_define("ONE_PROCESS"); + is_graceful = 0; + ap_listen_pre_config(); + ap_daemons_to_start = DEFAULT_START_DAEMON; + ap_thread_limit = HARD_THREAD_LIMIT; + ap_pid_fname = DEFAULT_PIDLOG; + ap_max_requests_per_child = DEFAULT_MAX_REQUESTS_PER_CHILD; + ap_extended_status = 0; + ap_min_spare_threads = DEFAULT_MIN_SPARE_THREAD; + ap_max_spare_threads = DEFAULT_MAX_SPARE_THREAD; +} + + + +static void mpmt_os2_hooks(apr_pool_t *p) +{ + ap_hook_pre_config(mpmt_os2_pre_config, NULL, NULL, APR_HOOK_MIDDLE); +} + + + +static const char *set_daemons_to_start(cmd_parms *cmd, void *dummy, const char *arg) +{ + const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); + + if (err != NULL) { + return err; + } + + ap_daemons_to_start = atoi(arg); + return NULL; +} + + + +static const char *set_min_spare_threads(cmd_parms *cmd, void *dummy, + const char *arg) +{ + const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); + + if (err != NULL) { + return err; + } + + ap_min_spare_threads = atoi(arg); + + if (ap_min_spare_threads <= 0) { + ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, + "WARNING: detected MinSpareThreads set to non-positive."); + ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, + "Resetting to 1 to avoid almost certain Apache failure."); + ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL, + "Please read the documentation."); + ap_min_spare_threads = 1; + } + + return NULL; +} + + + +static const char *set_max_spare_threads(cmd_parms *cmd, void *dummy, + const char *arg) +{ + const char *err = ap_check_cmd_context(cmd, GLOBAL_ONLY); + + if (err != NULL) { + return err; + } + + ap_max_spare_threads = atoi(arg); + return NULL; +} + + + +static const command_rec mpmt_os2_cmds[] = { +LISTEN_COMMANDS +AP_INIT_TAKE1( "StartServers", set_daemons_to_start, NULL, RSRC_CONF, + "Number of child processes launched at server startup" ), +AP_INIT_TAKE1("MinSpareThreads", set_min_spare_threads, NULL, RSRC_CONF, + "Minimum number of idle children, to handle request spikes"), +AP_INIT_TAKE1("MaxSpareThreads", set_max_spare_threads, NULL, RSRC_CONF, + "Maximum number of idle children"), +{ NULL } +}; + +module AP_MODULE_DECLARE_DATA mpm_mpmt_os2_module = { + MPM20_MODULE_STUFF, + NULL, /* hook to run before apache parses args */ + NULL, /* create per-directory config structure */ + NULL, /* merge per-directory config structures */ + NULL, /* create per-server config structure */ + NULL, /* merge per-server config structures */ + mpmt_os2_cmds, /* command apr_table_t */ + mpmt_os2_hooks, /* register_hooks */ +}; diff --git a/server/mpm/mpmt_os2/mpmt_os2_child.c b/server/mpm/mpmt_os2/mpmt_os2_child.c new file mode 100644 index 0000000000..36a96ca939 --- /dev/null +++ b/server/mpm/mpmt_os2/mpmt_os2_child.c @@ -0,0 +1,463 @@ +/* ==================================================================== + * The Apache Software License, Version 1.1 + * + * Copyright (c) 2000-2001 The Apache Software Foundation. All rights + * reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * 3. The end-user documentation included with the redistribution, + * if any, must include the following acknowledgment: + * "This product includes software developed by the + * Apache Software Foundation (http://www.apache.org/)." + * Alternately, this acknowledgment may appear in the software itself, + * if and wherever such third-party acknowledgments normally appear. + * + * 4. The names "Apache" and "Apache Software Foundation" must + * not be used to endorse or promote products derived from this + * software without prior written permission. For written + * permission, please contact apache@apache.org. + * + * 5. Products derived from this software may not be called "Apache", + * nor may "Apache" appear in their name, without prior written + * permission of the Apache Software Foundation. + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR + * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF + * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * ==================================================================== + * + * This software consists of voluntary contributions made by many + * individuals on behalf of the Apache Software Foundation. For more + * information on the Apache Software Foundation, please see + * <http://www.apache.org/>. + * + * Portions of this software are based upon public domain software + * originally written at the National Center for Supercomputing Applications, + * University of Illinois, Urbana-Champaign. + */ + +#define CORE_PRIVATE +#define INCL_NOPMAPI +#define INCL_DOS +#define INCL_DOSERRORS + +#include "ap_config.h" +#include "httpd.h" +#include "mpm_default.h" +#include "http_main.h" +#include "http_log.h" +#include "http_config.h" +#include "http_core.h" /* for get_remote_host */ +#include "http_connection.h" +#include "mpm.h" +#include "ap_mpm.h" +#include "ap_listen.h" +#include "apr_portable.h" +#include "mpm_common.h" +#include "apr_strings.h" +#include <os2.h> +#include <process.h> + +typedef struct { + apr_pool_t *pconn; + apr_socket_t *conn_sd; +} worker_args_t; + +#define WORKTYPE_CONN 0 +#define WORKTYPE_EXIT 1 + +static apr_pool_t *pchild = NULL; +static int child_slot; +static int shutdown_pending = 0; +extern int ap_my_generation; +static int volatile is_graceful = 1; +HEV shutdown_event; /* signaled when this child is shutting down */ + +/* grab some MPM globals */ +extern int ap_min_spare_threads; +extern int ap_max_spare_threads; +extern HMTX ap_mpm_accept_mutex; + +static void worker_main(void *vpArg); +static void clean_child_exit(int code); +static void set_signals(); +static void server_maintenance(void *vpArg); + + +static void clean_child_exit(int code) +{ + if (pchild) { + apr_pool_destroy(pchild); + } + + exit(code); +} + + + +void ap_mpm_child_main(apr_pool_t *pconf) +{ + ap_listen_rec *lr = NULL; + ap_listen_rec *first_lr = NULL; + int requests_this_child = 0; + apr_socket_t *sd = ap_listeners->sd; + int nsds, rv = 0; + unsigned long ulTimes; + int my_pid = getpid(); + ULONG rc, c; + HQUEUE workq; + apr_pollfd_t *pollset; + int num_listeners; + TID server_maint_tid; + + /* Stop Ctrl-C/Ctrl-Break signals going to child processes */ + DosSetSignalExceptionFocus(0, &ulTimes); + set_signals(); + + /* Create pool for child */ + apr_pool_create(&pchild, pconf); + + /* Create an event semaphore used to trigger other threads to shutdown */ + rc = DosCreateEventSem(NULL, &shutdown_event, 0, FALSE); + + if (rc) { + ap_log_error(APLOG_MARK, APLOG_ERR, APR_FROM_OS_ERROR(rc), ap_server_conf, + "unable to create shutdown semaphore, exiting"); + clean_child_exit(APEXIT_CHILDFATAL); + } + + /* Gain access to the scoreboard. */ + rc = DosGetNamedSharedMem((PPVOID)&ap_scoreboard_image, ap_scoreboard_fname, + PAG_READ|PAG_WRITE); + + if (rc) { + ap_log_error(APLOG_MARK, APLOG_ERR, APR_FROM_OS_ERROR(rc), ap_server_conf, + "scoreboard not readable in child, exiting"); + clean_child_exit(APEXIT_CHILDFATAL); + } + + /* Gain access to the accpet mutex */ + rc = DosOpenMutexSem(NULL, &ap_mpm_accept_mutex); + + if (rc) { + ap_log_error(APLOG_MARK, APLOG_ERR, APR_FROM_OS_ERROR(rc), ap_server_conf, + "accept mutex couldn't be accessed in child, exiting"); + clean_child_exit(APEXIT_CHILDFATAL); + } + + /* Find our pid in the scoreboard so we know what slot our parent allocated us */ + for (child_slot = 0; ap_scoreboard_image->parent[child_slot].pid != my_pid && child_slot < HARD_SERVER_LIMIT; child_slot++); + + if (child_slot == HARD_SERVER_LIMIT) { + ap_log_error(APLOG_MARK, APLOG_ERR|APLOG_NOERRNO, 0, ap_server_conf, + "child pid not found in scoreboard, exiting"); + clean_child_exit(APEXIT_CHILDFATAL); + } + + ap_my_generation = ap_scoreboard_image->parent[child_slot].generation; + + /* Set up an OS/2 queue for passing connections & termination requests + * to worker threads + */ + rc = DosCreateQueue(&workq, QUE_FIFO, apr_psprintf(pchild, "/queues/httpd/work.%d", my_pid)); + + if (rc) { + ap_log_error(APLOG_MARK, APLOG_ERR, APR_FROM_OS_ERROR(rc), ap_server_conf, + "unable to create work queue, exiting"); + clean_child_exit(APEXIT_CHILDFATAL); + } + + /* Create initial pool of worker threads */ + for (c = 0; c < ap_min_spare_threads; c++) { +// ap_scoreboard_image->servers[child_slot][c].tid = _beginthread(worker_main, NULL, 128*1024, (void *)c); + } + + /* Start maintenance thread */ + server_maint_tid = _beginthread(server_maintenance, NULL, 32768, NULL); + + /* Set up poll */ + for (num_listeners = 0, lr = ap_listeners; lr; lr = lr->next) { + num_listeners++; + } + + apr_poll_setup(&pollset, num_listeners, pchild); + + for (lr = ap_listeners; lr; lr = lr->next) { + apr_poll_socket_add(pollset, lr->sd, APR_POLLIN); + } + + /* Main connection accept loop */ + do { + apr_pool_t *pconn; + worker_args_t *worker_args; + + apr_pool_create(&pconn, pchild); + worker_args = apr_palloc(pconn, sizeof(worker_args_t)); + worker_args->pconn = pconn; + + if (num_listeners == 1) { + rv = apr_accept(&worker_args->conn_sd, ap_listeners->sd, pconn); + } else { + rc = DosRequestMutexSem(ap_mpm_accept_mutex, SEM_INDEFINITE_WAIT); + + if (shutdown_pending) { + DosReleaseMutexSem(ap_mpm_accept_mutex); + break; + } + + rv = APR_FROM_OS_ERROR(rc); + + if (rv == APR_SUCCESS) { + rv = apr_poll(pollset, &nsds, -1); + DosReleaseMutexSem(ap_mpm_accept_mutex); + } + + if (rv == APR_SUCCESS) { + if (first_lr == NULL) { + first_lr = ap_listeners; + } + + lr = first_lr; + + do { + apr_int16_t event; + + apr_poll_revents_get(&event, lr->sd, pollset); + + if (event == APR_POLLIN) { + apr_sockaddr_t *sa; + apr_port_t port; + apr_socket_addr_get(&sa, APR_LOCAL, lr->sd); + apr_sockaddr_port_get(&port, sa); + first_lr = lr->next; + break; + } + lr = lr->next; + + if (!lr) { + lr = ap_listeners; + } + } while (lr != first_lr); + + if (lr == first_lr) { + continue; + } + + sd = lr->sd; + rv = apr_accept(&worker_args->conn_sd, sd, pconn); + } + } + + if (rv != APR_SUCCESS) { + if (!APR_STATUS_IS_EINTR(rv)) { + ap_log_error(APLOG_MARK, APLOG_ERR, rv, ap_server_conf, + "apr_accept"); + clean_child_exit(APEXIT_CHILDFATAL); + } + } else { + DosWriteQueue(workq, WORKTYPE_CONN, sizeof(worker_args_t), worker_args, 0); + requests_this_child++; + } + + if (ap_max_requests_per_child != 0 && requests_this_child >= ap_max_requests_per_child) + break; + } while (!shutdown_pending && ap_my_generation == ap_scoreboard_image->global.running_generation); + + ap_scoreboard_image->parent[child_slot].quiescing = 1; + DosPostEventSem(shutdown_event); + DosWaitThread(&server_maint_tid, DCWW_WAIT); + + if (is_graceful) { + char someleft; + + /* tell our worker threads to exit */ + for (c=0; c<HARD_THREAD_LIMIT; c++) { + if (ap_scoreboard_image->servers[child_slot][c].status != SERVER_DEAD) { + DosWriteQueue(workq, WORKTYPE_EXIT, 0, NULL, 0); + } + } + + do { + someleft = 0; + + for (c=0; c<HARD_THREAD_LIMIT; c++) { + if (ap_scoreboard_image->servers[child_slot][c].status != SERVER_DEAD) { + someleft = 1; + DosSleep(1000); + break; + } + } + } while (someleft); + } else { + DosPurgeQueue(workq); + + for (c=0; c<HARD_THREAD_LIMIT; c++) { + if (ap_scoreboard_image->servers[child_slot][c].status != SERVER_DEAD) { + DosKillThread(ap_scoreboard_image->servers[child_slot][c].tid); + } + } + } + + apr_pool_destroy(pchild); +} + + + +void add_worker() +{ + int thread_slot; + + /* Find a free thread slot */ + for (thread_slot=0; thread_slot < HARD_THREAD_LIMIT; thread_slot++) { + if (ap_scoreboard_image->servers[child_slot][thread_slot].status == SERVER_DEAD) { + ap_scoreboard_image->servers[child_slot][thread_slot].status = SERVER_STARTING; + ap_scoreboard_image->servers[child_slot][thread_slot].tid = + _beginthread(worker_main, NULL, 128*1024, (void *)thread_slot); + break; + } + } +} + + + +static void worker_main(void *vpArg) +{ + long conn_id; + conn_rec *current_conn; + apr_pool_t *pconn; + worker_args_t *worker_args; + HQUEUE workq; + PID owner; + int rc; + REQUESTDATA rd; + ULONG len; + BYTE priority; + int thread_slot = (int)vpArg; + + rc = DosOpenQueue(&owner, &workq, + apr_psprintf(pchild, "/queues/httpd/work.%d", getpid())); + + if (rc) { + ap_log_error(APLOG_MARK, APLOG_ERR, APR_FROM_OS_ERROR(rc), ap_server_conf, + "unable to open work queue, exiting"); + ap_scoreboard_image->servers[child_slot][thread_slot].tid = 0; + } + + conn_id = AP_ID_FROM_CHILD_THREAD(child_slot, thread_slot); + ap_update_child_status(child_slot, thread_slot, SERVER_READY, NULL); + + while (rc = DosReadQueue(workq, &rd, &len, (PPVOID)&worker_args, 0, DCWW_WAIT, &priority, NULLHANDLE), + rc == 0 && rd.ulData != WORKTYPE_EXIT) { + pconn = worker_args->pconn; + ap_sock_disable_nagle(worker_args->conn_sd); + current_conn = ap_new_connection(pconn, ap_server_conf, worker_args->conn_sd, conn_id); + + if (current_conn) { + ap_process_connection(current_conn); + ap_lingering_close(current_conn); + } + + apr_pool_destroy(pconn); + ap_update_child_status(child_slot, thread_slot, SERVER_READY, NULL); + } + + ap_update_child_status(child_slot, thread_slot, SERVER_DEAD, NULL); +} + + + +static void server_maintenance(void *vpArg) +{ + int num_idle, num_needed; + ULONG num_pending = 0; + int threadnum; + HQUEUE workq; + ULONG rc; + PID owner; + + rc = DosOpenQueue(&owner, &workq, + apr_psprintf(pchild, "/queues/httpd/work.%d", getpid())); + + if (rc) { + ap_log_error(APLOG_MARK, APLOG_ERR, APR_FROM_OS_ERROR(rc), ap_server_conf, + "unable to open work queue in maintenance thread"); + return; + } + + do { + for (num_idle=0, threadnum=0; threadnum < HARD_THREAD_LIMIT; threadnum++) { + num_idle += ap_scoreboard_image->servers[child_slot][threadnum].status == SERVER_READY; + } + + DosQueryQueue(workq, &num_pending); + num_needed = ap_min_spare_threads - num_idle + num_pending; + + if (num_needed > 0) { + for (threadnum=0; threadnum < num_needed; threadnum++) { + add_worker(); + } + } + + if (num_idle - num_pending > ap_max_spare_threads) { + DosWriteQueue(workq, WORKTYPE_EXIT, 0, NULL, 0); + } + } while (DosWaitEventSem(shutdown_event, 500) == ERROR_TIMEOUT); +} + + + +/* Signal handling routines */ + +static void sig_term(int sig) +{ + shutdown_pending = 1; + is_graceful = 0; + signal(SIGTERM, SIG_DFL); +} + + + +static void sig_hup(int sig) +{ + shutdown_pending = 1; + is_graceful = 1; +} + + + +static void set_signals() +{ + struct sigaction sa; + + sigemptyset(&sa.sa_mask); + sa.sa_flags = 0; + sa.sa_handler = sig_term; + + if (sigaction(SIGTERM, &sa, NULL) < 0) + ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGTERM)"); + + sa.sa_handler = sig_hup; + + if (sigaction(SIGHUP, &sa, NULL) < 0) + ap_log_error(APLOG_MARK, APLOG_WARNING, errno, ap_server_conf, "sigaction(SIGHUP)"); +} |